/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneEvaluationField.h
Construction from a sequence ID, and the index of the track within that sequence's track list
FMovieSceneEvaluationFieldSegmentPtr ( FMovieSceneSequenceIDRef InSequenceID, [FMovieSceneTrackIdentifier](API\Runtime\MovieScene\Evaluation\FMovieSceneTrackIdentifier) InTrackIdentifier, [FMovieSceneSegmentIdentifier](API\Runtime\MovieScene\Evaluation\FMovieSceneSegmentIdentifier) InSegmentID )